Fix kiosk startup

diskless.pkr.hcl

@@ -394,9 +394,11 @@ build {
       "chmod 0644 /etc/kiosk/kiosk.env",
       # Label the new files so they survive into the enforcing erofs.
       "restorecon -R /usr/local/bin/kiosk-session /etc/systemd/system/kiosk.service /etc/pam.d/kiosk /etc/xdg/weston /etc/kiosk /etc/chromium /etc/chromium-browser",
-      # Boot graphical and start the kiosk (replaces the tty1 getty).
+      # Enable the kiosk on multi-user.target (its [Install] WantedBy) so it
+      # starts on a normal boot and takes tty1 from the getty (Conflicts=). No
+      # set-default graphical.target: the kiosk needs no display-manager target,
+      # and relying on graphical.target left it dead at boot.
       "systemctl enable kiosk.service",
-      "systemctl set-default graphical.target",
       "rm -rf /tmp/kiosk",
       "echo \"==> kiosk enabled: $KIOSK_URL\"",
     ]